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  • SharePoint search 功能的定制开发

    概要

      客户要求改善 SharePoint 2007的搜索功能,我们要自定义开发搜索功能,一翻调查和研究,sharepoint 的搜索用到KeywordSearchQuery和FullTextSearchQuery 两种方式,因为我们要用到自定义的sharepoint list字段做为过虑条件,所以采用FullTextSearchQuery 来开发。

    设计

    FullTextSearchQuery 做sharepoint 2007二次开发要用到以下组件:

    using Microsoft.Office.Server;
    using Microsoft.Office.Server.Search;
    using Microsoft.Office.Server.Search.Query;

    在sharepoint 2007中,我们如下scope():

    image

    默认的有people和all sites两个scope。我们以All sites举例。

    sharepoint Content sources 在爬虫时的流程图(方便理解scope()内容的来源)

    2

    以下是查询的流程图:

    image

    用户使用查询时,sharepoint对于用户的安全检查:

    3

    以上说明仅供读者了解sharepoint查询时要做的工作.

    Microsoft.SharePoint.Search.Query 命名空间包括三个查询类:

    • FullTextSqlQuery 使用此类可执行 SQL 语法搜索查询。

    • KeywordQuery 使用此类可执行关键字语法搜索查询。

    为自定义搜索应用程序选择查询类

    若要确定用于自定义搜索应用程序(FullTextSqlQueryKeywordQuery)的适当的类,请考虑希望应用程序代码支持的搜索查询中的复杂级别。

        下面的列表标识仅受使用 FullTextSqlQuery 类的 SQL 搜索语法支持的附加查询元素:FREETEXT、CONTAINS、LIKE和ORDER BY.

    代码设计

        public class SharePointSearch
        {
    
            #region Fields
    
            string queryStr = @"select hitHighlightedProperties,size,Write, author, path,
                                hitHighlightedSummary,title,contentclass
                                from scope() where " +
                                "\"scope\" = '{0}' AND FREETEXT(defaultproperties, '{1}') ";
            string conditionSearchSource = " AND CONTAINS(path,'{0}')";
    
            #endregion
    
            #region Constructor
    
            /// <summary>
            /// Default constructor.
            /// </summary>
            public SharePointSearch()
            {
            }
    
            #endregion
    
            #region Public Methods
    
            /// <summary>
            /// 
            /// </summary>
            /// <param name="scope"></param>
            /// <param name="searchSource"></param>
            /// <param name="keyword"></param>
            /// <param name="rowLimit"></param>
            /// <returns></returns>
            public DataTable GetSearchResultByKeyWord(string scope, string searchSource, string keyword, int rowLimit)
            {
                string query = string.Format(this.queryStr, scope, keyword);
                if (!string.IsNullOrEmpty(searchSource))
                    query += string.Format(this.conditionSearchSource, searchSource);
    
                return this.CustomSearch(query, rowLimit);
            }
    
            /// <summary>
            /// 
            /// </summary>
            /// <param name="query"></param>
            /// <param name="rowLimit"></param>
            /// <returns></returns>
            public DataTable GetSearchResultByQuery(string query, int rowLimit)
            {
                return this.CustomSearch(query, rowLimit);
            }
    
            #endregion
    
            #region Private Methods
    
            /// <summary>
            /// Excute search query
            /// </summary>
            /// <param name="query"></param>
            /// <param name="rowLimit"></param>
            /// <returns></returns>
            private DataTable CustomSearch(string query, int rowLimit)
            {
                DataTable result = new DataTable();
                string url = SPContext.Current.Web.Url;
    
                using (SPSite site = new SPSite(url))
                {
                    ServerContext context = ServerContext.GetContext(site);
    
                    FullTextSqlQuery fullQuery = new FullTextSqlQuery(site);
                    fullQuery.Culture = System.Globalization.CultureInfo.InvariantCulture;
                    fullQuery.QueryText = query;
                    fullQuery.ResultTypes = ResultType.RelevantResults;
                    fullQuery.EnableStemming = false;
                    fullQuery.IgnoreAllNoiseQuery = true;
                    fullQuery.TrimDuplicates = true;
    
                    fullQuery.KeywordInclusion = KeywordInclusion.AnyKeyword;
                    fullQuery.RowLimit = rowLimit;
                    if (SPSecurity.AuthenticationMode != System.Web.Configuration.AuthenticationMode.Windows)
                        fullQuery.AuthenticationType = QueryAuthenticationType.PluggableAuthenticatedQuery;
                    else
                        fullQuery.AuthenticationType = QueryAuthenticationType.NtAuthenticatedQuery;
    
                    ResultTableCollection rt = fullQuery.Execute();
                    ResultTable resultTable = rt[ResultType.RelevantResults];
                    result.Load(resultTable, LoadOption.OverwriteChanges);
                }
    
                return result;
            }
    
            #endregion
        }

    而为什么FullTextSqlQuery 的属性是这样设置的,因为能过moss工具产生的xml结果图如下:

    <?xml version="1.0" encoding="utf-8" ?>
    <QueryPacket xmlns="urn:Microsoft.Search.Query" Revision="1000">
    <Query domain="QDomain">
     <SupportedFormats><Format>urn:Microsoft.Search.Response.Document.Document</Format></SupportedFormats>
     <Context>
       <QueryText language="en-US" type="MSSQLFT"><![CDATA[ SELECT Title, Rank, Size, Description, Write, Path FROM portal..scope() WHERE FREETEXT(DefaultProperties, 'test') AND  ( ("SCOPE" = 'All Sites') )   ORDER BY "Rank" DESC ]]></QueryText>
     </Context>
     <Range><StartAt>1</StartAt><Count>20</Count></Range>
     <EnableStemming>false</EnableStemming>
     <TrimDuplicates>true</TrimDuplicates>
     <IgnoreAllNoiseQuery>true</IgnoreAllNoiseQuery>
     <ImplicitAndBehavior>false</ImplicitAndBehavior>
     <IncludeRelevanceResults>true</IncludeRelevanceResults>
     <IncludeSpecialTermResults>false</IncludeSpecialTermResults>
     <IncludeHighConfidenceResults>false</IncludeHighConfidenceResults>
    </Query></QueryPacket>

    如果sharepoint里item内容语言是en-us的话,一定要在IE浏览器里设置:

    image

    把english[en]放到最上面。

    作者:spring yang

    出处:http://www.cnblogs.com/springyangwc/

    本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

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  • 原文地址:https://www.cnblogs.com/springyangwc/p/2101389.html
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